In Present perfect^x, Perfect progressive^x, Expressions^x

Hi everybody,Why do all the Grammar books use the expressions "simple present" and "simple past", although all the other tenses start with the tense-marker and add the aspect-marker then: present progressive, present perfect, present perfect progressive, past progressive, past...

She is eating dinner for one hour. / She has been eating dinner for one hour. He is watching TV all day. / He has been watching TV all day. ------------------------------------------------------------------------------------------------------------------------ Actually, these two cases are...

Hi I would like to know more about the use of "since" and "for" with the Present Perfect Simple. I have found that these expressions are mainly used in the Present Perfect Simple in order to show a continuous situation, (especially with stative verbs that most of the time are used only in the...

A. You can use the simple present perfect here: "I haven't worked as a teacher for 2 years." This is used (amongst other uses) when we are talking about something which happened in the past, but is somehow connected to the present. So, 2 years ago (past) you stopped working as a teacher, and...